Abstract: The invention relates to a method for purifying an alkyl hydroperoxide from dialkyl peroxide thereof, comprising a step of distillation in the presence of alcohol and water followed by extraction of the condensates using a hydrocarbon or a hydrocarbon blend.

Abstract: The present invention relates to a process for the concentration of a water-soluble organic peroxide, preferably an alkyl hydroperoxide, by reverse osmosis as well as to a process for the separation of a water-soluble organic peroxide and of a water-insoluble compound.

Abstract: The present invention relates to a method for purifying a mixture containing at least one alkyl hydroperoxide, preferably tert-butyl hydroperoxide or tert-amyl hydroperoxide, and at least one corresponding dialkyl hydroperoxide, said method comprising at least one step of extraction with water and at least one separation step which is carried out within the aqueous phase, obtained following the extraction step, in order to recover an aqueous solution which is rich in alkyl hydroperoxide. The invention also relates to an aqueous composition which is rich in alkyl hydroperoxide and contains at least 0.1% by weight of dialkyl peroxide in relation to the total weight of the composition.

Abstract: The present invention concerns a method and an apparatus (10, 20) for a continuous preparation of organic peroxides, with the reactor comprising at least one flow channel (1, 1a, 1b) configured as a reaction zone; an inlet system (2) in fluid communication with a first end of the at least one flow channel and configured for introducing two or more substances or a combination of substances into the at least one flow channel; an outlet system (3) in fluid communication with a second end of the at least one flow channel, the second end being located downstream of the first end and the outlet system being configured for extracting a reaction product present at the second end; an oscillatory system (4, 5) configured for superimposing an oscillatory flow on the flow of substances passing through the at least one flow channel, the oscillatory being effected in at least a section of the at least one flow channel; and a controller configured to implement the method by controlling the inlet system to introduce, accordi

Abstract: The invention relates to a process for manufacturing polyethylene or an ethylene copolymer, comprising a step of radical polymerization or copolymerization of ethylene in the presence: of a first peroxide polymerization initiator chosen from the diperketal peroxide compounds of formula: in which the R1, R2, R3, R6, R7 and R8 groups consist of substituted or unsubstituted, linear, branched or cyclic C1-C10 alkyl groups, of a second initiator, other than said first initiator, also consisting of a diperketal peroxide of formula (I).

Abstract: The present invention concerns a method and an apparatus (10, 20) for a continuous preparation of organic peroxides, with the reactor comprising at least one flow channel (1, 1a, 1b) configured as a reaction zone; an inlet system (2) in fluid communication with a first end of the at least one flow channel and configured for introducing two or more substances or a combination of substances into the at least one flow channel; an outlet system (3) in fluid communication with a second end of the at least one flow channel, the second end being located downstream of the first end and the outlet system being configured for extracting a reaction product present at the second end; an oscillatory system (4, 5) configured for superimposing an oscillatory flow on the flow of substances passing through the at least one flow channel, the oscillatory being effected in at least a section of the at least one flow channel; and a controller configured to implement the method by controlling the inlet system to introduce, accordi

Abstract: The invention relates to a process for manufacturing polyethylene or an ethylene copolymer, comprising a step of radical polymerization or copolymerization of ethylene in the presence: of a first peroxide polymerization initiator chosen from the diperketal peroxide compounds of formula: in which the R1, R2, R3, R6, R7 and R8 groups consist of substituted or unsubstituted, linear, branched or cyclic C1-C10 alkyl groups, of a second initiator, other than said first initiator, also consisting of a diperketal peroxide of formula (I).

Abstract: A method for preparing peroxide, including a step of treating, in a reaction medium, a component having at least one tertiary alcohol grouping with a compound having at least one tertiary hydroperoxide function in the presence of a catalyst, said method being characterized in that the catalyst includes a sulphonic acid and a inorganic acid, the molar ratio between the sulphonic acid and the aforementioned component including at least one tertiary alcohol grouping ranges from 0.05 to 0.8, and the molar ratio between the inorganic acid and the aforementioned component including at least one tertiary alcohol grouping ranges from 0.05 to 0.8. Also, to the peroxide resulting directly from said preparation method.

Abstract: A peroxide solution of organic peroxide in an organic solvent, including at least one peroxide in a solvent, the solvent having a hydrophobic alcohol wherein the main carbonated chain having the alcohol function includes at least six carbon atoms, the solution also including a second, hydrophilic alcohol solvent representing a maximum of 15% wt. % of the solution. Also, a thermohardenable composition including said solution, and a method and a use relating to the composition.

Abstract: The present invention relates to the preparation of trifluoroethylene (VF3 or TrFE) by hydrogenolyzis of chlorotrifluoroethylene (CTFE) in the gaseous phase over a group VIII metal catalyst deposited on a support. This method can be used to obtain VF3 in an economical manner in conditions which minimize the risk of explosion of this molecule. Using a catalyst containing a group VIII metal and, more specifically, containing Pd deposited on a support and a specific series of steps of separation and purification makes it possible to obtain excellent CTFE conversion rates and high selectivity in VF3 at atmospheric pressure and at low temperatures.

Abstract: A method for preparing peroxide, including a step of treating, in a reaction medium, a component having at least one tertiary alcohol grouping with a compound having at least one tertiary hydroperoxide function in the presence of a catalyst, said method being characterised in that the catalyst includes a sulphonic acid and a inorganic acid, the molar ratio between the sulphonic acid and the aforementioned component including at least one tertiary alcohol grouping ranges from 0.05 to 0.8, and the molar ratio between the inorganic acid and the aforementioned component including at least one tertiary alcohol grouping ranges from 0.05 to 0.8. Also, to the peroxide resulting directly from said preparation method.

Abstract: A method for manufacturing polyethylene or an ethylene copolymer, including a step of free radical polymerization or copolymerization of the ethylene at an initiation temperature varying from 150° C. to 200° C., at a pressure varying from 500 to 3000 bar, in the presence of a peroxidic polymerization initiator selected from among the peroxide compounds of formula (I) in which R1 and R8 are, separately, a C2-C6 alkyl group; R2, R3, R6 and R7 are, separately, a C1-C5 alkyl group; and R4 and R5 are, separately, a C1-C6 alkyl group.

Abstract: The present invention relates to the preparation of trifluoroethylene (VF3 or TrFE) by hydrogenolysis of chlorotrifluoroethylene (CTFE) in the gaseous phase over a group VIII metal catalyst deposited on a support. This method can be used to obtain VF3 in an economical manner in conditions which minimize the risk of explosion of this molecule. Using a catalyst containing a group VIII metal and, more specifically, containing Pd deposited on a support and a specific series of steps of separation and purification makes it possible to obtain excellent CTFE conversion rates and high selectivity in VF3 at atmospheric pressure and at low temperatures.

Abstract: A method for manufacturing polyethylene or an ethylene copolymer, including a step of free radical polymerisation or copolymerisation of the ethylene at an initiation temperature varying from 150° C. to 200° C., at a pressure varying from 500 to 3000 bar, in the presence of a peroxidic polymerisation initiator selected from among the peroxide compounds of formula (I) in which R1 and R8 are, separately, a C2-C6 alkyl group; R2, R3, R6 and R7 are, separately, a C1-C5 alkyl group; and R4 and R5 are, separately, a C1-C6 alkyl group.

Abstract: The present application relates to a method for manufacturing tert-butyl hydroperoxide that includes the following steps: a) fermenting renewable raw materials and optionally purifying the same to produce a mixture containing at least butanol; b) dehydrating the butanol into butane; c) converting the butane into isobutene and optionally hydrating the isobutene to produce tert-butanol; d) reacting the product of step c) with hydrogen peroxide so as to produce tert-butyl hydroperoxide; and e) isolating the tert-butyl hydroperoxide. The invention also relates to tert-butyl hydroperoxide containing carbon atoms from renewable resources, to the compositions containing said tert-butyl hydroperoxide, and also relates to the use thereof as a polymerization initiator.

Abstract: The present invention relates to the method for obtaining vinylidene fluoride and the subject matter thereof is more particularly the production of vinylidene fluoride by pyrolysis of 1,2-dichloro-2,2-difluoroethane in the presence of hydrogen at a temperature of greater than or equal to 400° C.

Abstract: The present invention relates to the method for obtaining vinylidene fluoride and the subject matter thereof is more particularly the production of vinylidene fluoride by pyrolysis of 1,2-dichloro-2,2-difluoroethane in the presence of hydrogen at a temperature of greater than or equal to 400° C.

Abstract: The present application relates to a method for manufacturing tert-butyl hydroperoxide that includes the following steps: a) fermenting renewable raw materials and optionally purifying the same to produce a mixture containing at least butanol; b) dehydrating the butanol into butane; c) converting the butane into isobutene and optionally hydrating the isobutene to produce tert-butanol; d) reacting the product of step c) with hydrogen peroxide so as to produce tert-butyl hydroperoxide; and e) isolating the tert-butyl hydroperoxide. The invention also relates to tert-butyl hydroperoxide containing carbon atoms from renewable resources, to the compositions containing said tert-butyl hydroperoxide, and also relates to the use thereof as a polymerization initiator.

Abstract: The present invention relates to a process for the preparation of lauryllactam in which a Beckmann rearrangement of cyclododecanone oxime is carried out. Said process is carried out in the gas phase at a temperature of between 180 and 450° C. in the presence of a microporous material having a three-dimensional inorganic main structure composed of tetrahedra connected via a common edge, called zeolite.

Abstract: The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.